Gengar ex

Whenever your opponent attaches an Energy card from their hand to 1 of their Pokémon, put 2 damage counters on that Pokémon.

You may move an Energy from your opponent's Active Pokémon to 1 of their Benched Pokémon.

Pokémon ex rule: When your Pokémon ex is Knocked Out, your opponent takes 2 Prize cards.